3.5mm Jack - Q. Does the stepped jack mean that I cannot use a 6.35mm adaptor?
Answer:
There should be no problem with attaching the stepped 3.5mm jack plug to a 1/4" adaptor.
As
per the attached example, it may look like it hasn’t gone all the way
in but that’s because its 2mm longer than a usual jack, with a stepped
design to accommodate a phone case - this is nothing to worry about.